GB2281640A - Stand-off control apparatus for plasma processing machines - Google Patents

Stand-off control apparatus for plasma processing machines

Info

Publication number
GB2281640A
GB2281640A GB9420119A GB9420119A GB2281640A GB 2281640 A GB2281640 A GB 2281640A GB 9420119 A GB9420119 A GB 9420119A GB 9420119 A GB9420119 A GB 9420119A GB 2281640 A GB2281640 A GB 2281640A
Authority
GB
United Kingdom
Prior art keywords
stand
control apparatus
arc voltage
plasma processing
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9420119A
Other versions
GB2281640B (en
GB9420119D0 (en
Inventor
Yozo Nishi
Iwao Kurokawa
Yoshihiko Hashizume
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Publication of GB9420119D0 publication Critical patent/GB9420119D0/en
Publication of GB2281640A publication Critical patent/GB2281640A/en
Application granted granted Critical
Publication of GB2281640B publication Critical patent/GB2281640B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/006—Control circuits therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/095—Monitoring or automatic control of welding parameters
    • B23K9/0953—Monitoring or automatic control of welding parameters using computing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/287—Supporting devices for electrode holders

Abstract

A stand-off control apparatus for plasma processing machines which is capable of maintaining optimum stand-off even when a processing speed (F) varies. In a stand-off control apparatus for plasma processing machines which is provided with a microcomputer (4) for maintaining an optimum stand-off (h0) by moving a torch (1) toward a work so that an independently inputted arc voltage V agrees with a speed-corrected target arc voltage (V0(F)) obtained by correcting a target arc voltage (V0), which is stored in advance, by an independently inputted processing speed (F), the microcomputer (4) judges at the time of varying a processing speed (F) whether the processing speed (F) is increased, decreased or kept unchanged, and apply the speed-corrected arc voltage (V0(F)) with respect to a relative case after the lapse of respective delay time ( DELTA t) which is independently stored. <IMAGE>
GB9420119A 1992-04-06 1993-04-06 Stand-off control apparatus for plasma processing machines Expired - Fee Related GB2281640B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP029095U JPH0578373U (en) 1992-04-06 1992-04-06 Stand-off control device for plasma processing machine
PCT/JP1993/000445 WO1993019883A1 (en) 1992-04-06 1993-04-06 Stand-off control apparatus for plasma processing machines

Publications (3)

Publication Number Publication Date
GB9420119D0 GB9420119D0 (en) 1994-11-16
GB2281640A true GB2281640A (en) 1995-03-08
GB2281640B GB2281640B (en) 1995-10-25

Family

ID=12266801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9420119A Expired - Fee Related GB2281640B (en) 1992-04-06 1993-04-06 Stand-off control apparatus for plasma processing machines

Country Status (4)

Country Link
US (1) US5521350A (en)
JP (1) JPH0578373U (en)
GB (1) GB2281640B (en)
WO (1) WO1993019883A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2830476A1 (en) * 2001-10-09 2003-04-11 Soudure Autogene Francaise Plasma cutting of a work piece with automatic adaptation of the plasma jet characteristics by modulation of the thermal and kinetic energy of the plasma jet and the voltage of the plasma arc

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5893986A (en) * 1997-04-11 1999-04-13 The Esab Group, Inc. Method of controlling a plasma arc cutting torch
US5900169A (en) * 1997-06-06 1999-05-04 Hypertherm, Inc. Safety circuit for a blow forward contact start plasma arc torch
US6028287A (en) * 1997-07-25 2000-02-22 Hyperthem, Inc. Plasma arc torch position control
US5866872A (en) * 1997-07-25 1999-02-02 Hypertherm, Inc. Plasma arc torch position control
AUPO901497A0 (en) * 1997-09-08 1997-10-02 Commonwealth Scientific And Industrial Research Organisation Controlled plasma arc cutting
US5844196A (en) * 1997-09-15 1998-12-01 The Esab Group, Inc. System and method for detecting nozzle and electrode wear
US6153850A (en) 1999-04-29 2000-11-28 The Esab Group, Inc. Method of cutting a workpiece along an arcuate path with a plasma arc torch
US6359251B1 (en) 2000-04-10 2002-03-19 Hypertherm, Inc. Centralized control architecture for a plasma arc system
US6947802B2 (en) * 2000-04-10 2005-09-20 Hypertherm, Inc. Centralized control architecture for a laser materials processing system
US6622058B1 (en) 2000-04-10 2003-09-16 Tate S. Picard Centralized control architecture for a plasma arc system
US6772040B1 (en) * 2000-04-10 2004-08-03 Hypertherm, Inc. Centralized control architecture for a plasma arc system
US7186947B2 (en) * 2003-03-31 2007-03-06 Hypertherm, Inc. Process monitor for laser and plasma materials processing of materials
US20060163220A1 (en) * 2005-01-27 2006-07-27 Brandt Aaron D Automatic gas control for a plasma arc torch
GB0900878D0 (en) 2009-01-20 2009-03-04 Renishaw Plc Method for optimising a measurement cycle
US8436271B2 (en) * 2010-04-14 2013-05-07 Baruch Boris Gutman Thermal nucleus fusion torch method
US10300551B2 (en) * 2016-11-14 2019-05-28 Matthew Fagan Metal analyzing plasma CNC cutting machine and associated methods
US10195683B2 (en) * 2016-11-14 2019-02-05 Matthew Fagan Metal analyzing plasma CNC cutting machine and associated methods
JP2021030245A (en) * 2019-08-19 2021-03-01 コマツ産機株式会社 Plasma cutter and method of controlling plasma cutter
CN112775524A (en) * 2019-11-08 2021-05-11 林肯环球股份有限公司 Liquid cooled plasma arc torch

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03297576A (en) * 1990-04-17 1991-12-27 Komatsu Ltd Apparatus for controlling stand-off in plasma cutting machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5116379B2 (en) * 1973-07-20 1976-05-24
DE2706232C3 (en) * 1977-02-15 1980-10-23 Messer Griesheim Gmbh, 6000 Frankfurt Method for keeping the distance of a tool constant from a workpiece to be machined and device for its implementation
US4550241A (en) * 1982-06-14 1985-10-29 W. A. Whitney Corp. Metal melting tool with improved stand-off means
DE69131932T2 (en) * 1990-04-17 2000-07-20 Komatsu Mfg Co Ltd Distance control method of a plasma cutting machine
JPH05378A (en) * 1990-04-17 1993-01-08 Komatsu Ltd Torch height control method for plasma cutting
US5288970A (en) * 1990-04-17 1994-02-22 Kabushiki Kaisha Komatsu Seisakusho Method of controlling torch height in plasma cutting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03297576A (en) * 1990-04-17 1991-12-27 Komatsu Ltd Apparatus for controlling stand-off in plasma cutting machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2830476A1 (en) * 2001-10-09 2003-04-11 Soudure Autogene Francaise Plasma cutting of a work piece with automatic adaptation of the plasma jet characteristics by modulation of the thermal and kinetic energy of the plasma jet and the voltage of the plasma arc
WO2003041903A1 (en) * 2001-10-09 2003-05-22 La Soudure Autogene Francaise Method and installation for modulated plasma jet cutting at sharp changes of direction, in particular angles
US7015416B2 (en) 2001-10-09 2006-03-21 La Soudure Autogène Française Plasma cutting torch speed modulation

Also Published As

Publication number Publication date
WO1993019883A1 (en) 1993-10-14
GB2281640B (en) 1995-10-25
US5521350A (en) 1996-05-28
GB9420119D0 (en) 1994-11-16
JPH0578373U (en) 1993-10-26

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Legal Events

Date Code Title Description
713D Proc. under sect. 13(1) pat. act 1977 ** appl. filed
713C Proceeding under section 13(3) of the patents act 1977
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980406